Observed bright light approaching from west, drawing closer proved to be 3 separate lights on triangular craft, which passed directly overhead at low altitude, totally silent.

I was returning home after work, between midnight & 2 AM, & saw an intense, bright light in the southwest sky. Thinking it was a very bright star, I continued to monitor it as I drove. Soon it separated into 3 distinct lights, & I realized it was approaching. As it got closer I saw there were 3 lights, one at each corner of an aircraft. I stopped my truck in the middle of the road, & got out to watch. The craft flew directly overhead, was maybe 40 feet across, and made no sound of note. It seemed to be just above the tops of the trees, & I was puzzled that there would be no discernible engine noise. I don't recall being able to distinguish the surface of the craft, just seeing the three lights, & the triangular shape as it passed overhead. I assumed it was something headed to the Little Rock Air Force Base, though as I said, it was so quiet, & so low to the ground, that I was in awe. Unfortunately I never made note of this occurence, so I don't know the date. I assume it would be in the winter months, as the road is in a very wooded area, & I remember seeing lots of clear space, as I do here when the trees are bare. The road, Dyer Street,  runs South of Malvern for about 4 miles... I stopped about 3 miles from Main Street to watch. I only can guess the year being between 1988 & 1990 because I was driving the truck I owned at that time. I report this now because I have since heard of similar type craft being observed.
Date and time are approximate.  We have assigned an arbitrary date in 1989 so that the report sorts to that year.  PD